Solar panels in Rhode Island
Roofs across Rhode Island get about 1,470 hours of usable sunlight a year, and electricity costs 28.3¢/kWh. That combination puts a typical system's payback at 5.7 years. Here's the detail, from real rooftop data across 4 Rhode Island cities.
Check your own roof in Rhode Island → These are regional figures; your roof's size, pitch and shading move them a lot.
How Rhode Island compares
Rhode Island gets more sunlight than 36% of the cities we measure, and its electricity costs more than 92% of states and provinces. Both matter, but not equally: the electricity rate usually matters more, because solar saves money by replacing power you would otherwise buy. A sunny state with cheap power often pays back slower than a cloudy state with expensive power. Why that happens →
Solar by city in Rhode Island
| City | Sun hrs/yr | Panels | Net cost | Payback |
|---|---|---|---|---|
| Warwick | 1,518 | 21 | $16,758 | 5.5 yrs |
| Pawtucket | 1,470 | 22 | $17,556 | 5.7 yrs |
| Cranston | 1,402 | 23 | $18,354 | 6 yrs |
| Providence | 1,392 | 23 | $18,354 | 6 yrs |
What a system costs in Rhode Island
| System | Size | kWh/yr | Net cost | Saves/yr | Payback |
|---|---|---|---|---|---|
| 8 panels | 3.2 kW | 3,998 | $6,384 | $1,132 | 5.6 yrs |
| 12 panels | 4.8 kW | 5,998 | $9,576 | $1,697 | 5.6 yrs |
| 16 panels | 6.4 kW | 7,997 | $12,768 | $2,263 | 5.6 yrs |
| 20 panels | 8 kW | 9,996 | $15,960 | $2,829 | 5.6 yrs |
| 26 panels | 10.4 kW | 12,995 | $20,748 | $3,212 | 6.5 yrs |
Payback stops improving as systems grow, then gets worse. You can only save on electricity you were going to buy, so once a system covers your usage the extra panels mostly export at a lower rate.
Rhode Island solar incentives
Every US household can claim the 30% federal residential clean energy credit, which is what the "after credit" figures above assume. On a $25,080 system that is $7,524 back. How the credit works →
State, utility and municipal incentives stack on top and change often — Rhode Island may offer rebates, property or sales tax exemptions, or performance payments. We deliberately don't list specific state programmes here because they change several times a year and stale numbers are worse than none. The DSIRE database is the standard reference and is kept current.
Rhode Island solar questions
Is solar worth it in Rhode Island?
At 28.3¢/kWh and 1,470 usable sun hours, a typical system pays back in about 5.7 years and returns roughly $59,200 over 25 years. That is a solid return.
How many solar panels do I need in Rhode Island?
About 22 panels for a home using 10,800 kWh a year. Each 400W panel produces roughly 500 kWh annually at Rhode Island sunlight levels.
How much do solar panels cost in Rhode Island?
A 8.8 kW system runs about $25,080 before incentives and $17,556 after the 30% federal credit. Quotes vary widely by installer and roof complexity — get three.
Worth reading before you buy
Regional estimates generated 2026-08-22 from Google Solar API rooftop samples across 4 Rhode Island cities, and average Rhode Island electricity rates. Not a quote and not financial or tax advice.